Tricone Bit, Drill Bit, PDC Bit manufacturer / supplier in China, offering API 7-1 Standard 6-1/8 Inch PDC Bit with 5 Blades for Oil Petroleum Water Mining Rock Well Drilling, API 7-1 Standard 12-1/4 Inch PDC/Tricone Combined Bit with Three Blades for Mining Well Drilling-Tools, 8 1/2 Inches Matrix Body PDC Bits with 16mm Cutters and 5 Blades for Medium Hard to Hard Formations and so on.